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• How to initiate an uninstall of a ClickOnce app, from within the app?

  - by dwolvin

  Can I reliably initiate the un-installation of a ClickOnce app, from within the app? In other words, I want to give the user a big "Uninstall Me Now" button on one of the forms. When a user clicks the button, I want to start the windows uninstall process for this app, and perhaps close the app. Reason: We are dead-ending a ClickOnce app and want to make it as easy to remove as it was to install. We don't want to send them down the path to "Add or Remove Programs" and risk them getting lost or distracted. Can this be done reliably?

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• symfony and entity manager

  - by Jenis Sam

  I want to do the following I have a database table of students, and I want to output each student name in a check box list. so checkbox. Student 1 checkbox. Student 2 Where the value of the checkbox is the student's ID. How can I do that using Symfony? I want teachers to be able to select one or more checkboxes. I tried following this tutorial: http://symfony.com/doc/current/cookbook/form/form_collections.html and using collections, but I am lost...

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• Prototype problem with replace

  - by xain

  Hi, in my html page, I have the following: <div id="rub"> Select at least one Rub </div> In the script code, I have if ( some condition ... ) $('rub').replace("Rubs selected:"); Which works fine, but when a second event is triggered, in the code I have if ( some other condition ... ) $('rub').replace("Selected at least one item:"); That gives the error $("rub") is null It's as if the rub reference was lost after the first replace. (Also tried with Element.replace with the same result) Any clues ? Thanks in advance.

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• event vs thread programming on server side.

  - by AlxPeter

  We are planning to start a fairly complex web-portal which is expected to attract good local traffic and I've been told by my boss to consider/analyse node.js for the serve side. I think scalability and multi-core support can be handled with an Nginx or Cherokee up in the front. 1) Is this node.js ready for some serious/big business? 2) Does this 'event/asynchronous' paradigm on server side has the potential to support the heavy traffic and data operation ? considering the fact that 'everything' is being processed in a single thread and all the live connections would be lost if it got crashed (though its easy to restart). 3) What are the advantages of event based programming compared to thread based style ? or vice-versa. (I know of higher cost associated with thread switching but hardware can be squeezed with event model.) Following are interesting but contradicting (to some extent) papers:- 1) http://www.usenix.org/events/hotos03/tech/full_papers/vonbehren/vonbehren_html 2) http://pdos.csail.mit.edu/~rtm/papers/dabek:event.pdf

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• 'Advanced' Console Application

  - by keynesiancross

  Hi all, I'm not sure if this question has been answered elsewhere and I can't seem to find anything through google that isn't a "Hello World" example... I'm coding in C# .NET 4.0. I'm trying to develop a console application that will open, display text, and then wait for the user to input commands, where the commands will run particular business logic. For example: If the user opens the application and types "help", I want to display a number of statements etc etc. I'm not sure how to code the 'event handler' for user input though. Hopefully this makes sense. Any help would be much appreciated! Cheers.

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• Parameter is not valid when getting image from stream

  - by duka1

  Hi guys, I have this code: MemoryStream ms = new MemoryStream(newbytes, 0, newbytes.Length); ms.Position = 0; ms.Write(newbytes, 0, newbytes.Length); Image img = Image.FromStream(ms); img.Save(@"C:\Users\gsira\Pictures\Blue hills5.jpg"); I get this error at the Image.FromStream(ms) call: System.ArgumentException: Parameter is not valid. at System.Drawing.Image.FromStream(Stream stream, Boolean useEmbeddedColorManagement, Boolean validateIma How can I resolve this? A couple of links which solve this problem (one on an MSDN thread) are broken so I am lost.

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• Simple RIA backend

  - by Jeremy

  I'm creating a prototype for a java web application. Frontend is a Swing-based java applet. Backend should be a type of web-service, that is called by applet. Backend should run inside a servlet container and should have its own security (username/password) database. I know, that Tomcat has its own user database (realm), but the app should have own. Web-services, in turn, carrying out app logic and database access (via Hibernate). I'm a newbie for a web development and I'm getting lost in a huge amount of the java web frameworks. Even just reading 'introduction' and 'getting started' documents takes a lot of time. So I need an advice which framework(s) are suitable for the task and not very complex for a quick start. Thank you

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• Three Java classes: point out all the issues you can find!

  - by Sicarius

  I wrote three classes for a colleague of mine (I'm new at this job). They compile just fine, but he tells me there are "defects, bugs, and style problems." He wants me to print the files out and mark the problems such as the standard coding conventions, best practices, format, design, and logic. I wrote this code when I was extremely tired and I plan to rewrite it completely. My mistake was showing to it before looking it over myself again. However, he still wants me to do the markings on paper. Any input is greatly appreciated! The three Java classes ['Station.java', 'ParserInt.java', 'ParserException.java'] are uploaded here: http://www.megaupload.com/?d=N2CUVSV2

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• How to implement B+ Tree for file systems ?

  - by user312544

  I have a text file which contains some info on extents about all the files in the file system, like below C:\Program Files\abcd.txt 12345 100 23456 200 C:\Program Files\bcde.txt 56789 50 26746 300 ... Now i have another binary which tries to find out about extents for all the files. Now currently i am using linear search to find extent info for the files in the above mentioned text file. This is a time consuming process. Is there a better way of coding this ? Like Implementing any good data structure like BTree. If B+ Tree is used what is the key, branch factor i need to use ?

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• jQuery UI .widgets resetting scroll positions of elements contained within

  - by Derek Adair

  I am making heavy use of jQuery UI with my latest project. Unfortunately I've hit a major wall due to some really whacky behavior exhibited by the jQuery UI widgets when they contain elements with scrollbars for overflow. Check out this demo Scroll down in one of the .scroll-container elements Click an accordion header Click on old header - note the element was auto-scrolled to the top. Is there anyway to prevent this from happening? It's screwing with a major plugin of mine that utilizes jQuery scrolling. I'm flat-out lost as to what to do here! Perhaps this is a bug worth mentioning in the jQuery UI dev forums... EDIT I am using Chrome - 8.0.552.231 and OSX 10.6.5

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• Validate decimal number in (known) national format

  - by Álvaro G. Vicario

  PHP has many built-in functions to validate numbers but they all expect input in computer format: 1234.56. I need to validate stuff like 1,234.56 (English) or 1.234,56 (Spanish), together with some typical attributes (accepted range, max number of decimals, etc.). I started writing my own function but I soon got lost. It's easy to read the user input into a float variable but I want to be able to detect numbers with invalid formats like 1,23456.7 or 1..25. Do you have any recommendation on the subject? (Decimal and thousand characters are known beforehand and it's okay to hard-code digit groups as three, there's no need to cover Indian number format.)

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• Manage bad_alloc exception in C++ construtor

  - by Jimmy zhang

  I have Java experience and recently am doing some C++ coding. My question is that if I have class A, in which I have to instantiate class B and class C as two of the member variables of A. If in the constructor of A, should I assume that allocations of class B and C never fail, and handle the bad allocation exception in the destructor of A? If I don't make that assumption, meaning that I add some try catch block to catch bad_alloc of class B and class C, then if the allocation exception occurs, should I do clean up in the constructor of A? What are the recommended practices? If "new" generates a bad allocation, what value does the pointer carry?

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• Creating a custom format string in a dataGridView

  - by Andy

  I have a dataGridView whose dataSource is a dataTable. My problem is that I want certain columns to be displayed in Hex. I can get that far with using something like this: foreach (DataGridViewColumn c in grid.Columns) { if (DISPLAYED_IN_HEX.Contains(c.Name)) { c.DefaultCellStyle.Format = "X"; } } My issue though is that I want this hex value prepended with 0x so as not to confuse anyone that they are in hexidecimal form. The values in the dataTable are various integral types. I looked into creating a custom IFormatProvider, but I don't think my coding skills are up to that par yet. Any other possible solutions?

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• Providing updates during a long Rails controller action

  - by highBandWidth

  I have an action that takes a long time. I want to be able to provide updates during the process so the user is not confused as to whether he lost the connection or something. Can I do something like this: class HeavyLiftingController < ApplicationController def data_mine render_update :js=>"alert('Just starting!')" # do some complicated find etc. render_update :js=>"alert('Found the records!')" # do some processing ... render_update :js=>"alert('Done processig')" # send @results to view end end

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• javascript not working on localhost

  - by Adam McMahon

  Ok so I'm lost here, frustrated and pulling my hair and out. Plus probably about to be fired or take a pay cut. I moved Files from a development server to my local machine. The files are consistent (used diff tool), all the dependencies are there. It works for the most part. The problem is that the some of the javascript (not all) is just not working. We're using jquery and a lot of plugins for it. I've checked with the web developer plugin in firefox and all the js files are loading. I cleared the cache in both firefox and chrome multiple times to no avail. The development server is a windows server running wamp. My local machine is running ubuntu. Somebody tell me what I missed.

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• MVC way of handling data input

  - by korki

  I have a data input module where I add the information of my product and its sub information like: product basic info product price info product price details price info and price details are related to product and are lists In my web forms approach I would store my main product object on the view state and I would populate it's pricing info and details while doing ajax postbacks. This way I can create a compact module that is very user friendly in terms of defining a lot of data from one place without the need to enter these data from seperate modules. And when I am done I would do one product.save() and that would persist all the data to the respective tables on db. Now I am building similar app on .net mvc framework and pondering on what would be the good way of handling this on mvc. I don't resonate towards storing all this on client side till I click save. And saving to the db after each action makes me remember the days I was coding on asp. Will appreciate your inputs on ways to approach this on mvc framework

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• Vista Basic theme ribbon issue

  - by Alain Rist

  Under Vista, when in Basic theme, after calling IUIFramework::Destroy() the Vista theme is lost, and enlarging the window does not display outside of the initial area. You can repro it easily with the SimpleRibbon SDK sample. In simpleribbon.cpp, insert in the WndProc switch block: case WM_KEYUP: DestroyFramework(); InvalidateRect(hWnd, NULL, TRUE); break; Compile, run, hit a key and try to enlarge in Vista Basic Theme (no problem in Win7 or Vista aero or Windows classic). How to work around? cheers, AR

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• Which Subversion do I install for Windows?

  - by johnny

  I was reading this article on Coding Horror: http://www.codinghorror.com/blog/2008/04/setting-up-subversion-on-windows.html I went to the downloads and am confused. I would have just downloaded the first entry but I am afraid it would break my server or something if I don't have apache. We use IIS only and I wouldn't want to break it somehow. I don't even need a web or webdav front end. Which one should I install on this page, please: http://subversion.tigris.org/servlets/ProjectDocumentList?folderID=91 thank you for any help. edit: thanks for information, but I am hoping to stay free with the "regular" subversion. I plan on using TortoiseSVN for the client.

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• Is Microsoft CCR gaining any traction?

  - by spender

  Microsoft's Concurrency and Coordination Runtime quite literally saved a project that was running into major issues with deadlocking. Since then I find that I use it more and more frequently for almost anything that requires asynchronous coding producing results that run lighter and faster than before. I can honestly state that it has transformed the way I think about multithread/multicore dev. Despite my personal love for CCR, there appears to be very little buzz surrounding it on the web and was wondering if anyone can offer any reason for this. Are there better alternatives, or is it a lack of promotion from MS, or are people simply happy with the existing tools?

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• functions in assembler

  - by stupid_idiot

  hi, i have philosophised about the purpose of stack a little bit and after some coding i figured out what is it's strength. The only thing that lies in my stomache is how does it work with functions? I tried to make some easy function for adding two numbers using universal registers but I suppose that's not how does it work in C for example.. where are all the parameters, local variables and where is the result stored? how would you rewrite this to assembler?(how would compiler for C rewrite it?) int function(int a, int &b, int *c){ return a*(b++)+(*c); } i know this example kinda sucks.. but this way i can understand all the possibilities

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• Custom marker changed to a black rectangle after clicking the marker few times on Google Map v2

  - by RajeevSahu

  Hi, How to avoid displaying black rectangles over the Custom marker. Actually Custom markers changed to a black image rectangle after clicking the marker few times on Google Map. I am using API V2. I am using Nokia N97 to display my google map with Custom markers. I am not sure, but I guess because of wi-fi connectivity, some times the connection lost, so at that moment when I click the Markers, they turned to black image rectangles. Any idea, how to avoid this thing. Thanks...

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• PHP no wait sem_acquire?

  - by SerEnder

  Not a specific code question, but more of a general coding question. I'm trying to use a semaphore in a work project to limit the number of users that can access certain processes at a concurrent time. From my understanding the following: $iKey = ftock($sSomeFileLocation,'sOneCharacterString'); //Generate the key if($sem_id = sem_get($iKey){ //1 user allowed if(sem_acquire($sem_id)){ //Do the limited process here sem_release($sem_id); } } The problem that I see here is that if there is already one user who has the semaphore key, then the next user just waits until the first user is done rather than just faulting out. Anyone know of a way that if the max_acquire number has been reached, sem_acquire (or similar) will just return false? Thanks

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• What experience is the most valued in a programmer?

  - by Christo

  I've been coding application level software for a while now. I've had some experience with internet (server/client based) applications, but that has been fairly scant. The field doesn't scare although I know that experience can be almost be measured in gold. I see myself as a highly qualified and experienced programmer, but I also see my short comings in these fields. Does this count against me (and others like me?) and would this cut anyone from obtaining the shortlist or are there other factors which bear more weight?

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• sqlite & python - only pulls the first result

  - by pencilNero

  This is pretty strange (admitedly, this is my first attempt with python / sqlite), but I can seem to get all of the rows if I do a fetchAll(), but other than that - no matter what I try, always ends up in the db only returning the first row - the second iteration stops because a null is returned. Wondering if there is something wrong with how I am coding this up in python? The db seems ok.. con = sqlite3.connect('backup.db') con.row_factory = sqlite3.Row cur = con.cursor() cur.execute('select * from tb1;') for row in cur: try: # row = dataCur.fetchone() #if row == None: break print type(row) print ' Starting on: %i' % row[0] cleaner = Cleaner(scripts=True, remove_tags=['img'], embedded=True) try: cleaned = cleaner.clean_html(row[2]) #data stored in second col cur.execute('update tb1 set data = ? where id = ?;', (cleaned, row[0])) except AttributeError: print 'Attribute error' print ' Ended on: %i' % row[0] except IOError: print 'IOexception'

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• Can Fluent NHibernate be configured to use an arbitrary prefix on a property backing field?

  - by dommer

  I'm currently using a convention to (auto)map collection properties to backing fields in Fluent NHibernate. So, I map a property "Orders" to a field "_orders". The convention I'm using to do this is: public class HasManyAccessConvention : IHasManyConvention { public void Apply(IOneToManyCollectionInstance instance) { instance.Access.CamelCaseField(CamelCasePrefix.Underscore); } } Can I write a convention that maps a (collection) property to a field with a non-standard prefix (ignoring whether this is good coding practice for the present)? So, the property "Orders" would be mapped to "xyz_orders", for example. If so, how would I go about this?

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